package com.atguigu.gulimall.product.exception;

import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestControllerAdvice(basePackages = "com.atguigu.gulimall.product.controller")
public class GulimallExceptionControllerAdvice {



    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public R handlerValidaException(MethodArgumentNotValidException e){
        BindingResult bindingResult = e.getBindingResult();
        List<FieldError> fieldErrors = bindingResult.getFieldErrors();
        Map<String,Object> errMap = new HashMap<>();
        fieldErrors.stream().forEach(fieldError -> {
            errMap.put(fieldError.getField(),fieldError.getDefaultMessage());
        });

        return R.error(BizCodeEnum.VAILD_EXCEPTION.getCode(),BizCodeEnum.VAILD_EXCEPTION.getMsg()).put("data",errMap);
    }

    @ExceptionHandler(value = Throwable.class)
    public R AllException(Throwable e){
        return R.error(BizCodeEnum.UNKNOW_EXCEPTION.getCode(),BizCodeEnum.UNKNOW_EXCEPTION.getMsg());
    }

    @ExceptionHandler(value = NullPointerException.class)
    public R NullPointExceptionHander(NullPointerException e){
        return R.error(BizCodeEnum.NULL_POINT_EXCEPTION.getCode(),BizCodeEnum.NULL_POINT_EXCEPTION.getMsg());
    }

}
